[Leica] BIG new Leica

[John McMaster]

It seems to be an odd TIF, opens in PhotoShop but not Mac preview

john

-----Original Message-----


Paul,

I can't get the link to work.

Jim Nichols
Tullahoma, TN USA

On 10/23/2015 4:23 PM, Paul Roark wrote:
> Frank Dernie wrote:
>
>> ​...
>>   much easier to design an exceptional lens if size is not a constraint.
>> ​...
>>
> ​Yes, everything is a whole set of compromises.  I assume Leica and 
> Zeiss will both continue to make optics that also cater to those who 
> value compactness.  The M line is Leica's current showcase of what it 
> can do.  It may be that the Loxia line for the Sony is representative 
> of what Zeiss can do for that platform.
>
> Since wide angle optics are the main area of my concern regarding the 
> Sony line, I was curious just how much of a penalty that platform will 
> pay.  To show this, I made a Tiff file with a cutout of the Leica v. 
> Zeiss Loxia 21mm f/2.8 entries into this competition shown on 
> different layers.  The images are adjusted to equalize size and distance from the sensor/film.
> Some might find looking at the two similar optics interesting.  
> Download the Tiff from 
> http://www.paulroark.com/Loxia-v-Leica-21-f28.tif
>
> As to relative sharpness, all we have are MTF curves that are not 
> necessarily comparable.  If they are to be believed, the Zeiss wins by 
> a hair.  My experience is that Leica is more conservative in these, and in
> the real world Leica might well win by a hair.   The main and more
> objective measure of performance that could be important is that, 
> consistent with the performances we see in other wide angle lenses, 
> the more retrofocus optic has less vignetting. Zeiss is claiming light 
> falloff at f/2.8 that is equal to the Leica at f/8.
>
> Paul
> www.PaulRoark.com
>
> ​